[linux-dvb] Re: refactoring

[Gerd Knorr <kraxel@bytesex.org>]

> >Well, unlike the application the kernel driver can stop the DMA in case
> >there are no more empty buffers which are to fill with data ...
> 
> Data would get lost in both cases, not?

Yes.

The difference is that if the driver stops the DMA it can:

  - notify the app about that (both dvb + alsa return some error code,
    with v4l2 you can see that by checking sequence numbers or
    timestamps) and.

  - you don't have the risc that the data changes while you are
    processing it because the ring buffer overflows ...

  Gerd

-- 
return -ENOSIG;